Water-cooled electrocarbon connection for electric furnaces.



G. A. DUN CAN. WATER GOOLED ELEOTROCA-RBON CONNECTION FOR ELECTRIC FURNAGES..

- APPLICATION FILED 001'. 5, 1908. v 91 5 ,668, Patented Mar. 16, 1909. 2 SHEETS-SHEET 1.

w I Z D L? q \w Q c 1* WITNESSES.-

A TTORNE 1 O. A. DUNCAN.

WATER GOOLED ELEGTROGARBON CONNECTION FOR ELECTRIC FURNACES.

APPLICATION FILED ooT. s, 1908."

Patented Mar. 16, 1909.

2 SHEET-SSHEBT 2.

INVENTOR.

WITNESS s.-

I 7 By I A TTORNA Y.

.'To all whom it may concern.-

of such connections.

CHARLES A. DUNCAN, OF DULUTH,'l\/HNNESOTAL WATER-COQLED nmcrnocannou vconn i:onionneon innncmmo FU-RNA'GES.

specifieatidn of: LettersrBatent.

il'atentediMazoli 16; 1909.

Application filed-October 5,1908. Serial No. 456,225.

'Be it known that I, CHARLES A. DUNCAN, a citizen of the United States,'residing at Duluth,'in'the county of St. Louisand State ofMinnesota, have invented certain new and useful l Improvements Water-Co oled Electrocarbon' Connections for'ElectricFurnaces, of which the'following is *aspecification, reference being had therein to the accompanying drawing.

'My invention relates to improvements in water cooled islectro-carbon connection for electric furnaces.

'The object of my inventionis to r'ovide a connection'ofthis character whic is supplied with Water-circulating means and thus providea cool and practically indestructible connectionfbetweenthe metal and carbon parts ofthe electrode, .iirhich'wi'll not only preserve such parts but renderthemha'ridable'vcry soon afterbeing used'in the fun nace. It is well understoodthat such electrodes, after being in use for some time/become very hot and cannotbetaken apart or handled for many hours after removalfrom the furnace for renewing or repairing any of the parts.

Another object of my invention is to provide a more simple, cheap and effective meansffor cooling the connections which in no way interferes with the usual operation In the accompanying d1*awings ,"Fi'gnre 1, is a side elevatio partly in section of an electric furnace showing the .application of my improved water-cooled connections. "Fig. 2, is'an enlarged end "view of one of my improved electro-h'eads or connections showing the carbon and theaup-perend ofthe head broken away. Fig. '3, 1s a side elevation of Fig. 2. EFig. 4,'is"an enlarged, vertical, sectionalview of one of thef-jawsshowing the Water chamber and the water inlet-and outlet. 5, is a vertical, sectional view taken onthe line a; w of Fig. 2.

' My invention relates, aseheretofor'e stated, to electricfurnaces, and pertains more particularly to open furnaces for the smelting andmaniifacture of calcium 'carbid where the heat is allowed to come directly in'con tact with the carbons and their'connections, and in order to properly illustrate the inventionI 'have shown a portable furnace 1 mounted within" the frame work 2, and carried :by said frame-work are the two vertically-adjustable electrodes 3 and-"4 which extend into'the furnace. The electrodes are p referablyiarranged at an angle;v as-shown in igf'l, and the inner edges thereof are provided; with rack barsfi whichme'sh with suitable pinions carried by the cross-ba16 of the frame 2, and said pinions are operated in any suitable manner whereby the electrodes may beraised or lowered as desired. "-The upper ends of the electrodes are electrically 0on nected to the transformer 7 in any desired manner, while the opposite or'lower ends have securedftherein the removable carbon 8.

which extend intojthe mixture 'withinthe furnace 'ltobe smelted.

The electrodes 3 and 4 are identical in every. res ect except that they carry the opposite po arity of the current of electricity and therefore I will specifically describebut one electrode. The electrode is, preferably com sed of aniI-beam 9 u on-the inner-edge of 'w ich is. placed the rack-bars"5 heretofore described. Carried by the lower end of the I beam 9 arethe Water-cooled heads which consist of-a fiXe'dhollow metal,jaw 10,. and the hinged hollow metal jaw 11, and between which the carbon is clamped as will be hereinafter more fully described. The said'aws are of a hollow! form and have: a central depending partition 12 extending within .a short distance of the lower wall 13 to 'cause the water to take a 2i -zag course through the 'aw and thus more t oroughly cool. theljaw. he jaws lO 11' haveat one end a water supply pipe 14 and attheoppositeen'd \a 'dischargepipe' l5, and thus it will be seen that the Water under. pressure circulates through the jaws and keeps them comparatively cool. The water is supplied through the pipes '16 and 17- from the transformer 7 and discharged throu' h the pipes 19 and 20 'i'rom the. jaws into t e drains. Bymeans ofthel'ointsi21, 22 and-23 the swinging;jaw is allowed to readily operatewithout"disconnecting any. of, the joints when the, jaw is opened" for replac ing the carbon or other repairs. Secured to the -web'Z L of theTI-beam'!) on each sideare the plates 25 and'26 Whiehrhave theirlower ends turned outwardly as indicated-at 27 and 28. Secured to theflower face of the outwardlyeturned: ends 27. and28 are inverted U-sha ed plates 29 into which the carbon is inserted. "The heads or jaws 10 and 11 are of a hollow form, as shown and described in respect to Fig. 4. The jaw 10 is securely fastened permanently to the side of the I-beani "9 while the other jaw is mountedand whereby the same is permanently held I when the movable jaw isin its inward position.

The movable jaw 11 is provided with an upwardly-extending lug 32 over which the blfurcated end 33 of the link 34. extends and connected by a pin or bolt 35 serving as a pivot.

the bifurcated end 36 of the plate 3.7 and the pin 37 passes throu h the same pivoting it.

lhe plate 37- is provi ed with slots 38 through which bolts 39 pass, .and by means of which the plate is securely fastened to the I-beam,

yet allowing of the vertical adjustment of" stationary jaw, a movable jaw having a link the plate. I In order to securely with-enlar ed: portions 40 having openings through w ich thebolts' 41 pass, and by means of which the jaws are clam ed with the .carbons between the same. The bolts, as shown, are provided with nuts.

The carbons can either be made in one or two pieces, or could be made in a series of pieces, as shown in Fig.5, although this forms no part of my invention, and in no way affects the operation of the device.

I claim and desire to secure by Letters lfat- 1. A water cooled electrode, comprising stationary jaw, a hinged jaw carried by the stationary aw, and a pipe connection for the movable andstationaryjaws.

2. A water cooled electrode comprising a stationary j aw,a awhinged to the stationary jaw, a watersupply pipe foreach aw, and a Water dischargepi efor eachjaw. 7

stationary hollow jaw, a jaw hinged to the sta- 3. A water 000 ed electrode comprising a tionary jaw, means for clamping the jaws together with the carbon between them, and a water supply and discharge for each jaw.

4. A. water cooled electrode comprising a stationary jaw, a aw hinged'to the stationary aw, means .for locking the awstog'e'ther.

with the carbon between the same, a water. supply and discharge pipe for the'stationary jaw, and a water supply and discharge pipe connected to the movable jaw, and a swinging connection between the supply and dis-' char e pipe'sqof the stationary jaw and the y and discharge pipes of the movable aw.

The upper end of the link- 34 enters fasten the two jaws in I 'their inward position, clamping the carbons" in position, the jaws at each end areprovided The 'oints 21, 22 and 23 allow the movable I pipe foreach jaw.

hollow jaw rigidly 1 1 55,- A water cooled electrode comprising a stationary jaw, a movable jaw hinged to the stationary jaw, bolts passing through said jaws for clamping the carbonbetween stationary jaw, bolts passing through said ,jaws for clamping the carbon between the aws,s'aid station'aryand movable aWs hav mg independent water circulating means for cooling the jaws.

7. A water cooled electrode comprising a stationaryjaw, a movable jaw having a link hingeconnection with the stationary jaw,

and said' jaws being hollow, and water sup- I,

ply and dlscharge pipes for causing a circulation of water through the jaws.

8. A water cooled electrode-comprising hinge connection" with the stationary jaw,

bolts passing through the said jaws for clamping the carbon between the jaws, said .jaws being hollow, and water supply and dis charge pipes for causing a, circulation, of

water through theavcs.

9. Thecombination with a smelting fur nac e,",a frame above the same, electrodes supported by the frame and formed of I- beams, rack-bars carried by beams, pinions" carried by the frame and meshing with the rack-bars, a hollow stationary jaw carried 'bythe I-beam, a movable jawhinged to the stationary j aw, means for clamping the jaws together withthe carbon between the'same, and a watersupply and discharge pipe for -eachjaw. f- 10. The combination with a smelting furnace, a frame above the same, electrodes supported by the'.frame and formed of L. beams, rack-bars carried by the beams, pinions carried by the frame and meshing with the rack-bars, a hollow stationary jaw' carried by the Ibeam, a movable jaw hinged to the I-beam, boltspassing through the same, and a water supply and discharge 11. A water cooled electrode comprising a :the jaws for clamping the carbon'between stationary 'hollo'w jaw, a hinged hollow jaw,

bolts for clamping thesame together with the carbon between the same, a water supply for each jaw, and a discharge for each j aw.

12. An' electrode comprising a beam, a

plates secured to the ,web thereof. and having their ends turned at right angles,a U-shaped carbon receiving member secured to. the laterally-tu'rned ends of the plateaa jaw rigidly:

secured to the lower end 5 ow jaw pivotallymounted carried by one edge of the beam, a jawpivo'tedtoithe opposite side of the' beam, and

- 'the carbon, a plate ad'ustably sec'ured'to the V opposit e edge of the earn, a link pivotally. connected'to-the'plat-e, a jaw pivotally-connected to the lower, end of the "link, and 4 means for clamping saidjaws together.

15(An electrod'e 'comprising an Ibeam, plates secured to the sides of said beam and means for clamping the jaws together.

14.An electrode comprising an I-beam,

-ajaw rigidly carried thereby and having an inwardlyeextendinglug toienter a recess in ha laterally-turned lower ends, an inverte U-sha ed member secured to'v the laterally-turne 'ends' of the plates, a hollow jaw rigidly-secured'to'one edgeof the beam, a plate-adjustably secured to the'opposite edge of the beam, ,a link pivotally connected to said plate, a hollow aw pivotally connected 4 if d nk. a v a s pp y Pip for each I aw, and a discharge pipe'for each jaw, and olts clamping the jaws together, with the carbon between the same.

16. The'combination with a smelting furnace, a frame above the same, electrodes supported by the frame, and rack-bars carried thereby, pinions carried by the frame and meshing. With the rack-bars for raising and lowering the same, a transformer adjacent the furnace and electrically connected to the electrode, a water cooled means carriedby. the electrode, and means for supplyelectrode.

erally-turned ends of the plates, a hollow the water from :the transformer to the" .17. A11 electrode comprising ab'eam, holjaw'rigidly secured to one edgeof the beam,

a plate adjustably secured to the opposite edge, of the beam, alink-pivotally connected to said plate, a hollow. jaw pivotally con nected to said link, a water supply and dis charge pipe for. the rigid jaw, a water supply and discharge pipe for the movable 'jaw and having a swinging connection with the Water supply and discharge pipe of the stationary aw, and means for clamping the jaws to-v gether with the carbon between the same.

Intestimony whereof I afiix my signature in presence of two witnesses.

Witnesses:

W. W. MOMILLAN, I S, GEO. STEVENS.

CHARLES A. DUNCAN. y 

